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[IWLWIFI]: add iwlwifi wireless drivers
[linux-2.6/mini2440.git] / net / mac80211 / ieee80211.c
blob0c1f7b2e157c5211bcdc9611dd163a6f66a21332
1 /*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <net/mac80211.h>
12 #include <net/ieee80211_radiotap.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/etherdevice.h>
20 #include <linux/if_arp.h>
21 #include <linux/wireless.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/bitmap.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26
27 #include "ieee80211_common.h"
28 #include "ieee80211_i.h"
29 #include "ieee80211_rate.h"
30 #include "wep.h"
31 #include "wme.h"
32 #include "aes_ccm.h"
33 #include "ieee80211_led.h"
34 #include "ieee80211_cfg.h"
35 #include "debugfs.h"
36 #include "debugfs_netdev.h"
37
38 /*
39 * For seeing transmitted packets on monitor interfaces
40 * we have a radiotap header too.
41 */
42 struct ieee80211_tx_status_rtap_hdr {
43 struct ieee80211_radiotap_header hdr;
44 __le16 tx_flags;
45 u8 data_retries;
46 } __attribute__ ((packed));
47
48 /* common interface routines */
49
50 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
51 {
52 memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
53 return ETH_ALEN;
54 }
55
56 /* master interface */
57
58 static int ieee80211_master_open(struct net_device *dev)
59 {
60 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
61 struct ieee80211_sub_if_data *sdata;
62 int res = -EOPNOTSUPP;
63
64 read_lock(&local->sub_if_lock);
65 list_for_each_entry(sdata, &local->sub_if_list, list) {
66 if (sdata->dev != dev && netif_running(sdata->dev)) {
67 res = 0;
68 break;
69 }
70 }
71 read_unlock(&local->sub_if_lock);
72 return res;
73 }
74
75 static int ieee80211_master_stop(struct net_device *dev)
76 {
77 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
78 struct ieee80211_sub_if_data *sdata;
79
80 read_lock(&local->sub_if_lock);
81 list_for_each_entry(sdata, &local->sub_if_list, list)
82 if (sdata->dev != dev && netif_running(sdata->dev))
83 dev_close(sdata->dev);
84 read_unlock(&local->sub_if_lock);
85
86 return 0;
87 }
88
89 /* management interface */
90
91 static void
92 ieee80211_fill_frame_info(struct ieee80211_local *local,
93 struct ieee80211_frame_info *fi,
94 struct ieee80211_rx_status *status)
95 {
96 if (status) {
97 struct timespec ts;
98 struct ieee80211_rate *rate;
99
100 jiffies_to_timespec(jiffies, &ts);
101 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
102 ts.tv_nsec / 1000);
103 fi->mactime = cpu_to_be64(status->mactime);
104 switch (status->phymode) {
105 case MODE_IEEE80211A:
106 fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
107 break;
108 case MODE_IEEE80211B:
109 fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
110 break;
111 case MODE_IEEE80211G:
112 fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
113 break;
114 default:
115 fi->phytype = htonl(0xAAAAAAAA);
116 break;
117 }
118 fi->channel = htonl(status->channel);
119 rate = ieee80211_get_rate(local, status->phymode,
120 status->rate);
121 if (rate) {
122 fi->datarate = htonl(rate->rate);
123 if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
124 if (status->rate == rate->val)
125 fi->preamble = htonl(2); /* long */
126 else if (status->rate == rate->val2)
127 fi->preamble = htonl(1); /* short */
128 } else
129 fi->preamble = htonl(0);
130 } else {
131 fi->datarate = htonl(0);
132 fi->preamble = htonl(0);
133 }
134
135 fi->antenna = htonl(status->antenna);
136 fi->priority = htonl(0xffffffff); /* no clue */
137 fi->ssi_type = htonl(ieee80211_ssi_raw);
138 fi->ssi_signal = htonl(status->ssi);
139 fi->ssi_noise = 0x00000000;
140 fi->encoding = 0;
141 } else {
142 /* clear everything because we really don't know.
143 * the msg_type field isn't present on monitor frames
144 * so we don't know whether it will be present or not,
145 * but it's ok to not clear it since it'll be assigned
146 * anyway */
147 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
148
149 fi->ssi_type = htonl(ieee80211_ssi_none);
150 }
151 fi->version = htonl(IEEE80211_FI_VERSION);
152 fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
153 }
154
155 /* this routine is actually not just for this, but also
156 * for pushing fake 'management' frames into userspace.
157 * it shall be replaced by a netlink-based system. */
158 void
159 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
160 struct ieee80211_rx_status *status, u32 msg_type)
161 {
162 struct ieee80211_frame_info *fi;
163 const size_t hlen = sizeof(struct ieee80211_frame_info);
164 struct net_device *dev = local->apdev;
165
166 skb->dev = dev;
167
168 if (skb_headroom(skb) < hlen) {
169 I802_DEBUG_INC(local->rx_expand_skb_head);
170 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
171 dev_kfree_skb(skb);
172 return;
173 }
174 }
175
176 fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
177
178 ieee80211_fill_frame_info(local, fi, status);
179 fi->msg_type = htonl(msg_type);
180
181 dev->stats.rx_packets++;
182 dev->stats.rx_bytes += skb->len;
183
184 skb_set_mac_header(skb, 0);
185 skb->ip_summed = CHECKSUM_UNNECESSARY;
186 skb->pkt_type = PACKET_OTHERHOST;
187 skb->protocol = htons(ETH_P_802_2);
188 memset(skb->cb, 0, sizeof(skb->cb));
189 netif_rx(skb);
190 }
191
192 void ieee80211_key_threshold_notify(struct net_device *dev,
193 struct ieee80211_key *key,
194 struct sta_info *sta)
195 {
196 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
197 struct sk_buff *skb;
198 struct ieee80211_msg_key_notification *msg;
199
200 /* if no one will get it anyway, don't even allocate it.
201 * unlikely because this is only relevant for APs
202 * where the device must be open... */
203 if (unlikely(!local->apdev))
204 return;
205
206 skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
207 sizeof(struct ieee80211_msg_key_notification));
208 if (!skb)
209 return;
210
211 skb_reserve(skb, sizeof(struct ieee80211_frame_info));
212 msg = (struct ieee80211_msg_key_notification *)
213 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
214 msg->tx_rx_count = key->tx_rx_count;
215 memcpy(msg->ifname, dev->name, IFNAMSIZ);
216 if (sta)
217 memcpy(msg->addr, sta->addr, ETH_ALEN);
218 else
219 memset(msg->addr, 0xff, ETH_ALEN);
220
221 key->tx_rx_count = 0;
222
223 ieee80211_rx_mgmt(local, skb, NULL,
224 ieee80211_msg_key_threshold_notification);
225 }
226
227 static int ieee80211_mgmt_open(struct net_device *dev)
228 {
229 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
230
231 if (!netif_running(local->mdev))
232 return -EOPNOTSUPP;
233 return 0;
234 }
235
236 static int ieee80211_mgmt_stop(struct net_device *dev)
237 {
238 return 0;
239 }
240
241 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
242 {
243 /* FIX: what would be proper limits for MTU?
244 * This interface uses 802.11 frames. */
245 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
246 printk(KERN_WARNING "%s: invalid MTU %d\n",
247 dev->name, new_mtu);
248 return -EINVAL;
249 }
250
251 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
252 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
253 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
254 dev->mtu = new_mtu;
255 return 0;
256 }
257
258 void ieee80211_if_mgmt_setup(struct net_device *dev)
259 {
260 ether_setup(dev);
261 dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
262 dev->change_mtu = ieee80211_change_mtu_apdev;
263 dev->open = ieee80211_mgmt_open;
264 dev->stop = ieee80211_mgmt_stop;
265 dev->type = ARPHRD_IEEE80211_PRISM;
266 dev->hard_header_parse = header_parse_80211;
267 dev->uninit = ieee80211_if_reinit;
268 dev->destructor = ieee80211_if_free;
269 }
270
271 /* regular interfaces */
272
273 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
274 {
275 /* FIX: what would be proper limits for MTU?
276 * This interface uses 802.3 frames. */
277 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
278 printk(KERN_WARNING "%s: invalid MTU %d\n",
279 dev->name, new_mtu);
280 return -EINVAL;
281 }
282
283 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
284 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
285 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
286 dev->mtu = new_mtu;
287 return 0;
288 }
289
290 static inline int identical_mac_addr_allowed(int type1, int type2)
291 {
292 return (type1 == IEEE80211_IF_TYPE_MNTR ||
293 type2 == IEEE80211_IF_TYPE_MNTR ||
294 (type1 == IEEE80211_IF_TYPE_AP &&
295 type2 == IEEE80211_IF_TYPE_WDS) ||
296 (type1 == IEEE80211_IF_TYPE_WDS &&
297 (type2 == IEEE80211_IF_TYPE_WDS ||
298 type2 == IEEE80211_IF_TYPE_AP)) ||
299 (type1 == IEEE80211_IF_TYPE_AP &&
300 type2 == IEEE80211_IF_TYPE_VLAN) ||
301 (type1 == IEEE80211_IF_TYPE_VLAN &&
302 (type2 == IEEE80211_IF_TYPE_AP ||
303 type2 == IEEE80211_IF_TYPE_VLAN)));
304 }
305
306 /* Check if running monitor interfaces should go to a "soft monitor" mode
307 * and switch them if necessary. */
308 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
309 {
310 struct ieee80211_if_init_conf conf;
311
312 if (local->open_count && local->open_count == local->monitors &&
313 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
314 local->ops->remove_interface) {
315 conf.if_id = -1;
316 conf.type = IEEE80211_IF_TYPE_MNTR;
317 conf.mac_addr = NULL;
318 local->ops->remove_interface(local_to_hw(local), &conf);
319 }
320 }
321
322 /* Check if running monitor interfaces should go to a "hard monitor" mode
323 * and switch them if necessary. */
324 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
325 {
326 struct ieee80211_if_init_conf conf;
327
328 if (local->open_count && local->open_count == local->monitors &&
329 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
330 conf.if_id = -1;
331 conf.type = IEEE80211_IF_TYPE_MNTR;
332 conf.mac_addr = NULL;
333 local->ops->add_interface(local_to_hw(local), &conf);
334 }
335 }
336
337 static void ieee80211_if_open(struct net_device *dev)
338 {
339 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
340
341 switch (sdata->type) {
342 case IEEE80211_IF_TYPE_STA:
343 case IEEE80211_IF_TYPE_IBSS:
344 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
345 break;
346 }
347 }
348
349 static int ieee80211_open(struct net_device *dev)
350 {
351 struct ieee80211_sub_if_data *sdata, *nsdata;
352 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
353 struct ieee80211_if_init_conf conf;
354 int res;
355
356 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
357 read_lock(&local->sub_if_lock);
358 list_for_each_entry(nsdata, &local->sub_if_list, list) {
359 struct net_device *ndev = nsdata->dev;
360
361 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
362 compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
363 !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
364 read_unlock(&local->sub_if_lock);
365 return -ENOTUNIQ;
366 }
367 }
368 read_unlock(&local->sub_if_lock);
369
370 if (sdata->type == IEEE80211_IF_TYPE_WDS &&
371 is_zero_ether_addr(sdata->u.wds.remote_addr))
372 return -ENOLINK;
373
374 if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
375 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
376 /* run the interface in a "soft monitor" mode */
377 local->monitors++;
378 local->open_count++;
379 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
380 return 0;
381 }
382 ieee80211_if_open(dev);
383 ieee80211_start_soft_monitor(local);
384
385 conf.if_id = dev->ifindex;
386 conf.type = sdata->type;
387 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
388 conf.mac_addr = NULL;
389 else
390 conf.mac_addr = dev->dev_addr;
391 res = local->ops->add_interface(local_to_hw(local), &conf);
392 if (res) {
393 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
394 ieee80211_start_hard_monitor(local);
395 return res;
396 }
397
398 if (local->open_count == 0) {
399 res = 0;
400 tasklet_enable(&local->tx_pending_tasklet);
401 tasklet_enable(&local->tasklet);
402 if (local->ops->open)
403 res = local->ops->open(local_to_hw(local));
404 if (res == 0) {
405 res = dev_open(local->mdev);
406 if (res) {
407 if (local->ops->stop)
408 local->ops->stop(local_to_hw(local));
409 } else {
410 res = ieee80211_hw_config(local);
411 if (res && local->ops->stop)
412 local->ops->stop(local_to_hw(local));
413 else if (!res && local->apdev)
414 dev_open(local->apdev);
415 }
416 }
417 if (res) {
418 if (local->ops->remove_interface)
419 local->ops->remove_interface(local_to_hw(local),
420 &conf);
421 return res;
422 }
423 }
424 local->open_count++;
425
426 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
427 local->monitors++;
428 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
429 } else {
430 ieee80211_if_config(dev);
431 ieee80211_reset_erp_info(dev);
432 ieee80211_enable_keys(sdata);
433 }
434
435 if (sdata->type == IEEE80211_IF_TYPE_STA &&
436 !local->user_space_mlme)
437 netif_carrier_off(dev);
438 else
439 netif_carrier_on(dev);
440
441 netif_start_queue(dev);
442 return 0;
443 }
444
445 static void ieee80211_if_shutdown(struct net_device *dev)
446 {
447 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
448 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
449
450 ASSERT_RTNL();
451 switch (sdata->type) {
452 case IEEE80211_IF_TYPE_STA:
453 case IEEE80211_IF_TYPE_IBSS:
454 sdata->u.sta.state = IEEE80211_DISABLED;
455 del_timer_sync(&sdata->u.sta.timer);
456 /*
457 * Holding the sub_if_lock for writing here blocks
458 * out the receive path and makes sure it's not
459 * currently processing a packet that may get
460 * added to the queue.
461 */
462 write_lock_bh(&local->sub_if_lock);
463 skb_queue_purge(&sdata->u.sta.skb_queue);
464 write_unlock_bh(&local->sub_if_lock);
465
466 if (!local->ops->hw_scan &&
467 local->scan_dev == sdata->dev) {
468 local->sta_scanning = 0;
469 cancel_delayed_work(&local->scan_work);
470 }
471 flush_workqueue(local->hw.workqueue);
472 break;
473 }
474 }
475
476 static int ieee80211_stop(struct net_device *dev)
477 {
478 struct ieee80211_sub_if_data *sdata;
479 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
480
481 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
482
483 if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
484 local->open_count > 1 &&
485 !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
486 /* remove "soft monitor" interface */
487 local->open_count--;
488 local->monitors--;
489 if (!local->monitors)
490 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
491 return 0;
492 }
493
494 netif_stop_queue(dev);
495 ieee80211_if_shutdown(dev);
496
497 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
498 local->monitors--;
499 if (!local->monitors)
500 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
501 } else {
502 /* disable all keys for as long as this netdev is down */
503 ieee80211_disable_keys(sdata);
504 }
505
506 local->open_count--;
507 if (local->open_count == 0) {
508 if (netif_running(local->mdev))
509 dev_close(local->mdev);
510 if (local->apdev)
511 dev_close(local->apdev);
512 if (local->ops->stop)
513 local->ops->stop(local_to_hw(local));
514 tasklet_disable(&local->tx_pending_tasklet);
515 tasklet_disable(&local->tasklet);
516 }
517 if (local->ops->remove_interface) {
518 struct ieee80211_if_init_conf conf;
519
520 conf.if_id = dev->ifindex;
521 conf.type = sdata->type;
522 conf.mac_addr = dev->dev_addr;
523 local->ops->remove_interface(local_to_hw(local), &conf);
524 }
525
526 ieee80211_start_hard_monitor(local);
527
528 return 0;
529 }
530
531 enum netif_tx_lock_class {
532 TX_LOCK_NORMAL,
533 TX_LOCK_MASTER,
534 };
535
536 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
537 {
538 spin_lock_nested(&dev->_xmit_lock, subclass);
539 dev->xmit_lock_owner = smp_processor_id();
540 }
541
542 static void ieee80211_set_multicast_list(struct net_device *dev)
543 {
544 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
545 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
546 unsigned short flags;
547
548 netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
549 if (((dev->flags & IFF_ALLMULTI) != 0) ^
550 ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
551 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
552 local->iff_allmultis--;
553 else
554 local->iff_allmultis++;
555 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
556 }
557 if (((dev->flags & IFF_PROMISC) != 0) ^
558 ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
559 if (sdata->flags & IEEE80211_SDATA_PROMISC)
560 local->iff_promiscs--;
561 else
562 local->iff_promiscs++;
563 sdata->flags ^= IEEE80211_SDATA_PROMISC;
564 }
565 if (dev->mc_count != sdata->mc_count) {
566 local->mc_count = local->mc_count - sdata->mc_count +
567 dev->mc_count;
568 sdata->mc_count = dev->mc_count;
569 }
570 if (local->ops->set_multicast_list) {
571 flags = local->mdev->flags;
572 if (local->iff_allmultis)
573 flags |= IFF_ALLMULTI;
574 if (local->iff_promiscs)
575 flags |= IFF_PROMISC;
576 read_lock(&local->sub_if_lock);
577 local->ops->set_multicast_list(local_to_hw(local), flags,
578 local->mc_count);
579 read_unlock(&local->sub_if_lock);
580 }
581 netif_tx_unlock(local->mdev);
582 }
583
584 /* Must not be called for mdev and apdev */
585 void ieee80211_if_setup(struct net_device *dev)
586 {
587 ether_setup(dev);
588 dev->hard_start_xmit = ieee80211_subif_start_xmit;
589 dev->wireless_handlers = &ieee80211_iw_handler_def;
590 dev->set_multicast_list = ieee80211_set_multicast_list;
591 dev->change_mtu = ieee80211_change_mtu;
592 dev->open = ieee80211_open;
593 dev->stop = ieee80211_stop;
594 dev->uninit = ieee80211_if_reinit;
595 dev->destructor = ieee80211_if_free;
596 }
597
598 /* WDS specialties */
599
600 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
601 {
602 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
603 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
604 struct sta_info *sta;
605
606 if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
607 return 0;
608
609 /* Create STA entry for the new peer */
610 sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
611 if (!sta)
612 return -ENOMEM;
613 sta_info_put(sta);
614
615 /* Remove STA entry for the old peer */
616 sta = sta_info_get(local, sdata->u.wds.remote_addr);
617 if (sta) {
618 sta_info_free(sta);
619 sta_info_put(sta);
620 } else {
621 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
622 "peer " MAC_FMT "\n",
623 dev->name, MAC_ARG(sdata->u.wds.remote_addr));
624 }
625
626 /* Update WDS link data */
627 memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
628
629 return 0;
630 }
631
632 /* everything else */
633
634 static int __ieee80211_if_config(struct net_device *dev,
635 struct sk_buff *beacon,
636 struct ieee80211_tx_control *control)
637 {
638 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
639 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
640 struct ieee80211_if_conf conf;
641 static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
642
643 if (!local->ops->config_interface || !netif_running(dev))
644 return 0;
645
646 memset(&conf, 0, sizeof(conf));
647 conf.type = sdata->type;
648 if (sdata->type == IEEE80211_IF_TYPE_STA ||
649 sdata->type == IEEE80211_IF_TYPE_IBSS) {
650 if (local->sta_scanning &&
651 local->scan_dev == dev)
652 conf.bssid = scan_bssid;
653 else
654 conf.bssid = sdata->u.sta.bssid;
655 conf.ssid = sdata->u.sta.ssid;
656 conf.ssid_len = sdata->u.sta.ssid_len;
657 conf.generic_elem = sdata->u.sta.extra_ie;
658 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
659 } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
660 conf.ssid = sdata->u.ap.ssid;
661 conf.ssid_len = sdata->u.ap.ssid_len;
662 conf.generic_elem = sdata->u.ap.generic_elem;
663 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
664 conf.beacon = beacon;
665 conf.beacon_control = control;
666 }
667 return local->ops->config_interface(local_to_hw(local),
668 dev->ifindex, &conf);
669 }
670
671 int ieee80211_if_config(struct net_device *dev)
672 {
673 return __ieee80211_if_config(dev, NULL, NULL);
674 }
675
676 int ieee80211_if_config_beacon(struct net_device *dev)
677 {
678 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
679 struct ieee80211_tx_control control;
680 struct sk_buff *skb;
681
682 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
683 return 0;
684 skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
685 if (!skb)
686 return -ENOMEM;
687 return __ieee80211_if_config(dev, skb, &control);
688 }
689
690 int ieee80211_hw_config(struct ieee80211_local *local)
691 {
692 struct ieee80211_hw_mode *mode;
693 struct ieee80211_channel *chan;
694 int ret = 0;
695
696 if (local->sta_scanning) {
697 chan = local->scan_channel;
698 mode = local->scan_hw_mode;
699 } else {
700 chan = local->oper_channel;
701 mode = local->oper_hw_mode;
702 }
703
704 local->hw.conf.channel = chan->chan;
705 local->hw.conf.channel_val = chan->val;
706 local->hw.conf.power_level = chan->power_level;
707 local->hw.conf.freq = chan->freq;
708 local->hw.conf.phymode = mode->mode;
709 local->hw.conf.antenna_max = chan->antenna_max;
710 local->hw.conf.chan = chan;
711 local->hw.conf.mode = mode;
712
713 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
714 printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
715 "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
716 local->hw.conf.phymode);
717 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
718
719 if (local->ops->config)
720 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
721
722 return ret;
723 }
724
725 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
726 {
727 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
728 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
729 if (local->ops->erp_ie_changed)
730 local->ops->erp_ie_changed(local_to_hw(local), changes,
731 !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
732 !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
733 }
734
735 void ieee80211_reset_erp_info(struct net_device *dev)
736 {
737 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
738
739 sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
740 IEEE80211_SDATA_SHORT_PREAMBLE);
741 ieee80211_erp_info_change_notify(dev,
742 IEEE80211_ERP_CHANGE_PROTECTION |
743 IEEE80211_ERP_CHANGE_PREAMBLE);
744 }
745
746 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
747 struct dev_mc_list *prev,
748 void **ptr)
749 {
750 struct ieee80211_local *local = hw_to_local(hw);
751 struct ieee80211_sub_if_data *sdata = *ptr;
752 struct dev_mc_list *mc;
753
754 if (!prev) {
755 WARN_ON(sdata);
756 sdata = NULL;
757 }
758 if (!prev || !prev->next) {
759 if (sdata)
760 sdata = list_entry(sdata->list.next,
761 struct ieee80211_sub_if_data, list);
762 else
763 sdata = list_entry(local->sub_if_list.next,
764 struct ieee80211_sub_if_data, list);
765 if (&sdata->list != &local->sub_if_list)
766 mc = sdata->dev->mc_list;
767 else
768 mc = NULL;
769 } else
770 mc = prev->next;
771
772 *ptr = sdata;
773 return mc;
774 }
775 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
776
777 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
778 struct sk_buff *skb,
779 struct ieee80211_tx_status *status)
780 {
781 struct ieee80211_local *local = hw_to_local(hw);
782 struct ieee80211_tx_status *saved;
783 int tmp;
784
785 skb->dev = local->mdev;
786 saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
787 if (unlikely(!saved)) {
788 if (net_ratelimit())
789 printk(KERN_WARNING "%s: Not enough memory, "
790 "dropping tx status", skb->dev->name);
791 /* should be dev_kfree_skb_irq, but due to this function being
792 * named _irqsafe instead of just _irq we can't be sure that
793 * people won't call it from non-irq contexts */
794 dev_kfree_skb_any(skb);
795 return;
796 }
797 memcpy(saved, status, sizeof(struct ieee80211_tx_status));
798 /* copy pointer to saved status into skb->cb for use by tasklet */
799 memcpy(skb->cb, &saved, sizeof(saved));
800
801 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
802 skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
803 &local->skb_queue : &local->skb_queue_unreliable, skb);
804 tmp = skb_queue_len(&local->skb_queue) +
805 skb_queue_len(&local->skb_queue_unreliable);
806 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
807 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
808 memcpy(&saved, skb->cb, sizeof(saved));
809 kfree(saved);
810 dev_kfree_skb_irq(skb);
811 tmp--;
812 I802_DEBUG_INC(local->tx_status_drop);
813 }
814 tasklet_schedule(&local->tasklet);
815 }
816 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
817
818 static void ieee80211_tasklet_handler(unsigned long data)
819 {
820 struct ieee80211_local *local = (struct ieee80211_local *) data;
821 struct sk_buff *skb;
822 struct ieee80211_rx_status rx_status;
823 struct ieee80211_tx_status *tx_status;
824
825 while ((skb = skb_dequeue(&local->skb_queue)) ||
826 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
827 switch (skb->pkt_type) {
828 case IEEE80211_RX_MSG:
829 /* status is in skb->cb */
830 memcpy(&rx_status, skb->cb, sizeof(rx_status));
831 /* Clear skb->type in order to not confuse kernel
832 * netstack. */
833 skb->pkt_type = 0;
834 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
835 break;
836 case IEEE80211_TX_STATUS_MSG:
837 /* get pointer to saved status out of skb->cb */
838 memcpy(&tx_status, skb->cb, sizeof(tx_status));
839 skb->pkt_type = 0;
840 ieee80211_tx_status(local_to_hw(local),
841 skb, tx_status);
842 kfree(tx_status);
843 break;
844 default: /* should never get here! */
845 printk(KERN_ERR "%s: Unknown message type (%d)\n",
846 local->mdev->name, skb->pkt_type);
847 dev_kfree_skb(skb);
848 break;
849 }
850 }
851 }
852
853 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
854 * make a prepared TX frame (one that has been given to hw) to look like brand
855 * new IEEE 802.11 frame that is ready to go through TX processing again.
856 * Also, tx_packet_data in cb is restored from tx_control. */
857 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
858 struct ieee80211_key *key,
859 struct sk_buff *skb,
860 struct ieee80211_tx_control *control)
861 {
862 int hdrlen, iv_len, mic_len;
863 struct ieee80211_tx_packet_data *pkt_data;
864
865 pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
866 pkt_data->ifindex = control->ifindex;
867 pkt_data->flags = 0;
868 if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
869 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
870 if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
871 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
872 if (control->flags & IEEE80211_TXCTL_REQUEUE)
873 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
874 if (control->type == IEEE80211_IF_TYPE_MGMT)
875 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
876 pkt_data->queue = control->queue;
877
878 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
879
880 if (!key)
881 goto no_key;
882
883 switch (key->conf.alg) {
884 case ALG_WEP:
885 iv_len = WEP_IV_LEN;
886 mic_len = WEP_ICV_LEN;
887 break;
888 case ALG_TKIP:
889 iv_len = TKIP_IV_LEN;
890 mic_len = TKIP_ICV_LEN;
891 break;
892 case ALG_CCMP:
893 iv_len = CCMP_HDR_LEN;
894 mic_len = CCMP_MIC_LEN;
895 break;
896 default:
897 goto no_key;
898 }
899
900 if (skb->len >= mic_len &&
901 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
902 skb_trim(skb, skb->len - mic_len);
903 if (skb->len >= iv_len && skb->len > hdrlen) {
904 memmove(skb->data + iv_len, skb->data, hdrlen);
905 skb_pull(skb, iv_len);
906 }
907
908 no_key:
909 {
910 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
911 u16 fc = le16_to_cpu(hdr->frame_control);
912 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
913 fc &= ~IEEE80211_STYPE_QOS_DATA;
914 hdr->frame_control = cpu_to_le16(fc);
915 memmove(skb->data + 2, skb->data, hdrlen - 2);
916 skb_pull(skb, 2);
917 }
918 }
919 }
920
921 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
922 struct ieee80211_tx_status *status)
923 {
924 struct sk_buff *skb2;
925 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
926 struct ieee80211_local *local = hw_to_local(hw);
927 u16 frag, type;
928 u32 msg_type;
929 struct ieee80211_tx_status_rtap_hdr *rthdr;
930 struct ieee80211_sub_if_data *sdata;
931 int monitors;
932
933 if (!status) {
934 printk(KERN_ERR
935 "%s: ieee80211_tx_status called with NULL status\n",
936 local->mdev->name);
937 dev_kfree_skb(skb);
938 return;
939 }
940
941 if (status->excessive_retries) {
942 struct sta_info *sta;
943 sta = sta_info_get(local, hdr->addr1);
944 if (sta) {
945 if (sta->flags & WLAN_STA_PS) {
946 /* The STA is in power save mode, so assume
947 * that this TX packet failed because of that.
948 */
949 status->excessive_retries = 0;
950 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
951 }
952 sta_info_put(sta);
953 }
954 }
955
956 if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
957 struct sta_info *sta;
958 sta = sta_info_get(local, hdr->addr1);
959 if (sta) {
960 sta->tx_filtered_count++;
961
962 /* Clear the TX filter mask for this STA when sending
963 * the next packet. If the STA went to power save mode,
964 * this will happen when it is waking up for the next
965 * time. */
966 sta->clear_dst_mask = 1;
967
968 /* TODO: Is the WLAN_STA_PS flag always set here or is
969 * the race between RX and TX status causing some
970 * packets to be filtered out before 80211.o gets an
971 * update for PS status? This seems to be the case, so
972 * no changes are likely to be needed. */
973 if (sta->flags & WLAN_STA_PS &&
974 skb_queue_len(&sta->tx_filtered) <
975 STA_MAX_TX_BUFFER) {
976 ieee80211_remove_tx_extra(local, sta->key,
977 skb,
978 &status->control);
979 skb_queue_tail(&sta->tx_filtered, skb);
980 } else if (!(sta->flags & WLAN_STA_PS) &&
981 !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
982 /* Software retry the packet once */
983 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
984 ieee80211_remove_tx_extra(local, sta->key,
985 skb,
986 &status->control);
987 dev_queue_xmit(skb);
988 } else {
989 if (net_ratelimit()) {
990 printk(KERN_DEBUG "%s: dropped TX "
991 "filtered frame queue_len=%d "
992 "PS=%d @%lu\n",
993 local->mdev->name,
994 skb_queue_len(
995 &sta->tx_filtered),
996 !!(sta->flags & WLAN_STA_PS),
997 jiffies);
998 }
999 dev_kfree_skb(skb);
1000 }
1001 sta_info_put(sta);
1002 return;
1003 }
1004 } else {
1005 /* FIXME: STUPID to call this with both local and local->mdev */
1006 rate_control_tx_status(local, local->mdev, skb, status);
1007 }
1008
1009 ieee80211_led_tx(local, 0);
1010
1011 /* SNMP counters
1012 * Fragments are passed to low-level drivers as separate skbs, so these
1013 * are actually fragments, not frames. Update frame counters only for
1014 * the first fragment of the frame. */
1015
1016 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1017 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1018
1019 if (status->flags & IEEE80211_TX_STATUS_ACK) {
1020 if (frag == 0) {
1021 local->dot11TransmittedFrameCount++;
1022 if (is_multicast_ether_addr(hdr->addr1))
1023 local->dot11MulticastTransmittedFrameCount++;
1024 if (status->retry_count > 0)
1025 local->dot11RetryCount++;
1026 if (status->retry_count > 1)
1027 local->dot11MultipleRetryCount++;
1028 }
1029
1030 /* This counter shall be incremented for an acknowledged MPDU
1031 * with an individual address in the address 1 field or an MPDU
1032 * with a multicast address in the address 1 field of type Data
1033 * or Management. */
1034 if (!is_multicast_ether_addr(hdr->addr1) ||
1035 type == IEEE80211_FTYPE_DATA ||
1036 type == IEEE80211_FTYPE_MGMT)
1037 local->dot11TransmittedFragmentCount++;
1038 } else {
1039 if (frag == 0)
1040 local->dot11FailedCount++;
1041 }
1042
1043 msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1044 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1045
1046 /* this was a transmitted frame, but now we want to reuse it */
1047 skb_orphan(skb);
1048
1049 if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1050 local->apdev) {
1051 if (local->monitors) {
1052 skb2 = skb_clone(skb, GFP_ATOMIC);
1053 } else {
1054 skb2 = skb;
1055 skb = NULL;
1056 }
1057
1058 if (skb2)
1059 /* Send frame to hostapd */
1060 ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1061
1062 if (!skb)
1063 return;
1064 }
1065
1066 if (!local->monitors) {
1067 dev_kfree_skb(skb);
1068 return;
1069 }
1070
1071 /* send frame to monitor interfaces now */
1072
1073 if (skb_headroom(skb) < sizeof(*rthdr)) {
1074 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1075 dev_kfree_skb(skb);
1076 return;
1077 }
1078
1079 rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1080 skb_push(skb, sizeof(*rthdr));
1081
1082 memset(rthdr, 0, sizeof(*rthdr));
1083 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1084 rthdr->hdr.it_present =
1085 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1086 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1087
1088 if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1089 !is_multicast_ether_addr(hdr->addr1))
1090 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1091
1092 if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1093 (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1094 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1095 else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1096 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1097
1098 rthdr->data_retries = status->retry_count;
1099
1100 read_lock(&local->sub_if_lock);
1101 monitors = local->monitors;
1102 list_for_each_entry(sdata, &local->sub_if_list, list) {
1103 /*
1104 * Using the monitors counter is possibly racy, but
1105 * if the value is wrong we simply either clone the skb
1106 * once too much or forget sending it to one monitor iface
1107 * The latter case isn't nice but fixing the race is much
1108 * more complicated.
1109 */
1110 if (!monitors || !skb)
1111 goto out;
1112
1113 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1114 if (!netif_running(sdata->dev))
1115 continue;
1116 monitors--;
1117 if (monitors)
1118 skb2 = skb_clone(skb, GFP_KERNEL);
1119 else
1120 skb2 = NULL;
1121 skb->dev = sdata->dev;
1122 /* XXX: is this sufficient for BPF? */
1123 skb_set_mac_header(skb, 0);
1124 skb->ip_summed = CHECKSUM_UNNECESSARY;
1125 skb->pkt_type = PACKET_OTHERHOST;
1126 skb->protocol = htons(ETH_P_802_2);
1127 memset(skb->cb, 0, sizeof(skb->cb));
1128 netif_rx(skb);
1129 skb = skb2;
1130 }
1131 }
1132 out:
1133 read_unlock(&local->sub_if_lock);
1134 if (skb)
1135 dev_kfree_skb(skb);
1136 }
1137 EXPORT_SYMBOL(ieee80211_tx_status);
1138
1139 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1140 const struct ieee80211_ops *ops)
1141 {
1142 struct net_device *mdev;
1143 struct ieee80211_local *local;
1144 struct ieee80211_sub_if_data *sdata;
1145 int priv_size;
1146 struct wiphy *wiphy;
1147
1148 /* Ensure 32-byte alignment of our private data and hw private data.
1149 * We use the wiphy priv data for both our ieee80211_local and for
1150 * the driver's private data
1151 *
1152 * In memory it'll be like this:
1153 *
1154 * +-------------------------+
1155 * | struct wiphy |
1156 * +-------------------------+
1157 * | struct ieee80211_local |
1158 * +-------------------------+
1159 * | driver's private data |
1160 * +-------------------------+
1161 *
1162 */
1163 priv_size = ((sizeof(struct ieee80211_local) +
1164 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1165 priv_data_len;
1166
1167 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1168
1169 if (!wiphy)
1170 return NULL;
1171
1172 wiphy->privid = mac80211_wiphy_privid;
1173
1174 local = wiphy_priv(wiphy);
1175 local->hw.wiphy = wiphy;
1176
1177 local->hw.priv = (char *)local +
1178 ((sizeof(struct ieee80211_local) +
1179 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1180
1181 BUG_ON(!ops->tx);
1182 BUG_ON(!ops->config);
1183 BUG_ON(!ops->add_interface);
1184 local->ops = ops;
1185
1186 /* for now, mdev needs sub_if_data :/ */
1187 mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1188 "wmaster%d", ether_setup);
1189 if (!mdev) {
1190 wiphy_free(wiphy);
1191 return NULL;
1192 }
1193
1194 sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1195 mdev->ieee80211_ptr = &sdata->wdev;
1196 sdata->wdev.wiphy = wiphy;
1197
1198 local->hw.queues = 1; /* default */
1199
1200 local->mdev = mdev;
1201 local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1202 local->rx_handlers = ieee80211_rx_handlers;
1203 local->tx_handlers = ieee80211_tx_handlers;
1204
1205 local->bridge_packets = 1;
1206
1207 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1208 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1209 local->short_retry_limit = 7;
1210 local->long_retry_limit = 4;
1211 local->hw.conf.radio_enabled = 1;
1212
1213 local->enabled_modes = ~0;
1214
1215 INIT_LIST_HEAD(&local->modes_list);
1216
1217 rwlock_init(&local->sub_if_lock);
1218 INIT_LIST_HEAD(&local->sub_if_list);
1219
1220 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1221 ieee80211_rx_bss_list_init(mdev);
1222
1223 sta_info_init(local);
1224
1225 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1226 mdev->open = ieee80211_master_open;
1227 mdev->stop = ieee80211_master_stop;
1228 mdev->type = ARPHRD_IEEE80211;
1229 mdev->hard_header_parse = header_parse_80211;
1230
1231 sdata->type = IEEE80211_IF_TYPE_AP;
1232 sdata->dev = mdev;
1233 sdata->local = local;
1234 sdata->u.ap.force_unicast_rateidx = -1;
1235 sdata->u.ap.max_ratectrl_rateidx = -1;
1236 ieee80211_if_sdata_init(sdata);
1237 list_add_tail(&sdata->list, &local->sub_if_list);
1238
1239 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1240 (unsigned long)local);
1241 tasklet_disable(&local->tx_pending_tasklet);
1242
1243 tasklet_init(&local->tasklet,
1244 ieee80211_tasklet_handler,
1245 (unsigned long) local);
1246 tasklet_disable(&local->tasklet);
1247
1248 skb_queue_head_init(&local->skb_queue);
1249 skb_queue_head_init(&local->skb_queue_unreliable);
1250
1251 return local_to_hw(local);
1252 }
1253 EXPORT_SYMBOL(ieee80211_alloc_hw);
1254
1255 int ieee80211_register_hw(struct ieee80211_hw *hw)
1256 {
1257 struct ieee80211_local *local = hw_to_local(hw);
1258 const char *name;
1259 int result;
1260
1261 result = wiphy_register(local->hw.wiphy);
1262 if (result < 0)
1263 return result;
1264
1265 name = wiphy_dev(local->hw.wiphy)->driver->name;
1266 local->hw.workqueue = create_singlethread_workqueue(name);
1267 if (!local->hw.workqueue) {
1268 result = -ENOMEM;
1269 goto fail_workqueue;
1270 }
1271
1272 /*
1273 * The hardware needs headroom for sending the frame,
1274 * and we need some headroom for passing the frame to monitor
1275 * interfaces, but never both at the same time.
1276 */
1277 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1278 sizeof(struct ieee80211_tx_status_rtap_hdr));
1279
1280 debugfs_hw_add(local);
1281
1282 local->hw.conf.beacon_int = 1000;
1283
1284 local->wstats_flags |= local->hw.max_rssi ?
1285 IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1286 local->wstats_flags |= local->hw.max_signal ?
1287 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1288 local->wstats_flags |= local->hw.max_noise ?
1289 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1290 if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1291 local->wstats_flags |= IW_QUAL_DBM;
1292
1293 result = sta_info_start(local);
1294 if (result < 0)
1295 goto fail_sta_info;
1296
1297 rtnl_lock();
1298 result = dev_alloc_name(local->mdev, local->mdev->name);
1299 if (result < 0)
1300 goto fail_dev;
1301
1302 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1303 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1304
1305 result = register_netdevice(local->mdev);
1306 if (result < 0)
1307 goto fail_dev;
1308
1309 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1310
1311 result = ieee80211_init_rate_ctrl_alg(local, NULL);
1312 if (result < 0) {
1313 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1314 "algorithm\n", local->mdev->name);
1315 goto fail_rate;
1316 }
1317
1318 result = ieee80211_wep_init(local);
1319
1320 if (result < 0) {
1321 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1322 local->mdev->name);
1323 goto fail_wep;
1324 }
1325
1326 ieee80211_install_qdisc(local->mdev);
1327
1328 /* add one default STA interface */
1329 result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1330 IEEE80211_IF_TYPE_STA);
1331 if (result)
1332 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1333 local->mdev->name);
1334
1335 local->reg_state = IEEE80211_DEV_REGISTERED;
1336 rtnl_unlock();
1337
1338 ieee80211_led_init(local);
1339
1340 return 0;
1341
1342 fail_wep:
1343 rate_control_deinitialize(local);
1344 fail_rate:
1345 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1346 unregister_netdevice(local->mdev);
1347 fail_dev:
1348 rtnl_unlock();
1349 sta_info_stop(local);
1350 fail_sta_info:
1351 debugfs_hw_del(local);
1352 destroy_workqueue(local->hw.workqueue);
1353 fail_workqueue:
1354 wiphy_unregister(local->hw.wiphy);
1355 return result;
1356 }
1357 EXPORT_SYMBOL(ieee80211_register_hw);
1358
1359 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1360 struct ieee80211_hw_mode *mode)
1361 {
1362 struct ieee80211_local *local = hw_to_local(hw);
1363 struct ieee80211_rate *rate;
1364 int i;
1365
1366 INIT_LIST_HEAD(&mode->list);
1367 list_add_tail(&mode->list, &local->modes_list);
1368
1369 local->hw_modes |= (1 << mode->mode);
1370 for (i = 0; i < mode->num_rates; i++) {
1371 rate = &(mode->rates[i]);
1372 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1373 }
1374 ieee80211_prepare_rates(local, mode);
1375
1376 if (!local->oper_hw_mode) {
1377 /* Default to this mode */
1378 local->hw.conf.phymode = mode->mode;
1379 local->oper_hw_mode = local->scan_hw_mode = mode;
1380 local->oper_channel = local->scan_channel = &mode->channels[0];
1381 local->hw.conf.mode = local->oper_hw_mode;
1382 local->hw.conf.chan = local->oper_channel;
1383 }
1384
1385 if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1386 ieee80211_set_default_regdomain(mode);
1387
1388 return 0;
1389 }
1390 EXPORT_SYMBOL(ieee80211_register_hwmode);
1391
1392 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1393 {
1394 struct ieee80211_local *local = hw_to_local(hw);
1395 struct ieee80211_sub_if_data *sdata, *tmp;
1396 struct list_head tmp_list;
1397 int i;
1398
1399 tasklet_kill(&local->tx_pending_tasklet);
1400 tasklet_kill(&local->tasklet);
1401
1402 rtnl_lock();
1403
1404 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1405
1406 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1407 if (local->apdev)
1408 ieee80211_if_del_mgmt(local);
1409
1410 write_lock_bh(&local->sub_if_lock);
1411 list_replace_init(&local->sub_if_list, &tmp_list);
1412 write_unlock_bh(&local->sub_if_lock);
1413
1414 list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1415 __ieee80211_if_del(local, sdata);
1416
1417 rtnl_unlock();
1418
1419 ieee80211_rx_bss_list_deinit(local->mdev);
1420 ieee80211_clear_tx_pending(local);
1421 sta_info_stop(local);
1422 rate_control_deinitialize(local);
1423 debugfs_hw_del(local);
1424
1425 for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1426 kfree(local->supp_rates[i]);
1427 kfree(local->basic_rates[i]);
1428 }
1429
1430 if (skb_queue_len(&local->skb_queue)
1431 || skb_queue_len(&local->skb_queue_unreliable))
1432 printk(KERN_WARNING "%s: skb_queue not empty\n",
1433 local->mdev->name);
1434 skb_queue_purge(&local->skb_queue);
1435 skb_queue_purge(&local->skb_queue_unreliable);
1436
1437 destroy_workqueue(local->hw.workqueue);
1438 wiphy_unregister(local->hw.wiphy);
1439 ieee80211_wep_free(local);
1440 ieee80211_led_exit(local);
1441 }
1442 EXPORT_SYMBOL(ieee80211_unregister_hw);
1443
1444 void ieee80211_free_hw(struct ieee80211_hw *hw)
1445 {
1446 struct ieee80211_local *local = hw_to_local(hw);
1447
1448 ieee80211_if_free(local->mdev);
1449 wiphy_free(local->hw.wiphy);
1450 }
1451 EXPORT_SYMBOL(ieee80211_free_hw);
1452
1453 static int __init ieee80211_init(void)
1454 {
1455 struct sk_buff *skb;
1456 int ret;
1457
1458 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1459
1460 ret = ieee80211_wme_register();
1461 if (ret) {
1462 printk(KERN_DEBUG "ieee80211_init: failed to "
1463 "initialize WME (err=%d)\n", ret);
1464 return ret;
1465 }
1466
1467 ieee80211_debugfs_netdev_init();
1468 ieee80211_regdomain_init();
1469
1470 return 0;
1471 }
1472
1473 static void __exit ieee80211_exit(void)
1474 {
1475 ieee80211_wme_unregister();
1476 ieee80211_debugfs_netdev_exit();
1477 }
1478
1479
1480 subsys_initcall(ieee80211_init);
1481 module_exit(ieee80211_exit);
1482
1483 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1484 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards